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crank 6 bolt flywheel
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12-03-2016, 01:37 AM
Post: #1
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crank 6 bolt flywheel
hey guys, long time ago i bought an extra engine. now want to drop it in and it has a 6 bolt flywheel crank. how can i identify if its a 4ac one or a 7af?
![[Image: AEU86 AE86 - crank 6 bolt flywheel]](http://home.online.nl/~aheese/under2.JPG "AEU86 AE86 - crank 6 bolt flywheel") 5/2018 BMW F22 Coupe 1/1985 Toyota AE86 Levin Coupe |
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12-04-2016, 09:18 PM
Post: #2
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crank 6 bolt flywheel
extra engine... if it were 7A it would be in a 7A block... Or did I miss something?? 7A stroke is 85.5, while 4AC would be 77. At that big of a difference you could likely measure the crank throws to see which it is closer too....
Dan - You can |  .... OR you can ask for help!!!OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991 |
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12-04-2016, 10:06 PM
(This post was last modified: 12-04-2016 10:06 PM by DJexor.)
Post: #3
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crank 6 bolt flywheel
(12-04-2016 09:18 PM)oldeskewltoy Wrote: extra engine... if it were 7A it would be in a 7A block... Or did I miss something?? 7A stroke is 85.5, while 4AC would be 77. At that big of a difference you could likely measure the crank throws to see which it is closer too.... Absolutely true. I only have no idea how to visually separate the 4age block to the 7a block. I have heard that a 7a block with a 4age head is like a stroker mod to 1.8L engine. Would be nice if there is a way to see it without opening the engine. 5/2018 BMW F22 Coupe 1/1985 Toyota AE86 Levin Coupe |
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12-04-2016, 11:42 PM
Post: #4
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crank 6 bolt flywheel
stick a long screwdriver through the sparkplug hole and turn the crank and measure the stroke. Very crude mthod but should do the trick. As mentioned by Dan the difference is big enough to distinguish the 2
Sent from my SM-T800 using Tapatalk AE86 ex-daily |
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12-04-2016, 11:44 PM
Post: #5
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crank 6 bolt flywheel
smart one! thanks :-D
5/2018 BMW F22 Coupe 1/1985 Toyota AE86 Levin Coupe |
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12-05-2016, 08:21 AM
Post: #6
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crank 6 bolt flywheel
Also you could check the block stamp on the side of the engine if it reads 4A XXXX or 7A XXXX.
Daily Beater: Civic EG5 Work in progress Car: AE86 |
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